1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

A New Patch To Improve Radeon Gallium3D Performance

Michael Larabel

Published on 29 June 2012
Written by Michael Larabel
Page 1 of 4 - 5 Comments

A new patch has surfaced on the Mesa development list that allows for further performance improvements to the R600 Radeon Gallium3D driver for some OpenGL workloads.

The new patch in question is from Vadim Girlin and is titled "r600g: improve flushed depth texture handling v2." Vadim reports that for workloads where flushed depth texture is frequently used can significantly boost the performance. The level of improvement that Vadim cites is 30% for the Lightsmark OpenGL lighting benchmark. The patch presents 83 lines of new code and 61 lines of deleted code across the R600 Gallium3D driver. The patch has yet to be applied to mainline Mesa Git master but can be currently found on the mailing list and be easily applied against head.

"Use r600_resource_texture::flushed_depth_texture for GPU access, and allocate it in the VRAM. For transfers we'll allocate untiled texture in the GTT and store it in the r600_transfer::staging.

Improves performance when flushed depth texture is frequently used by the GPU (about 30% for Lightsmark)."

After seeing this patch surface on the mailing list this week, I ran some tests on three different Radeon graphics cards. Using the latest Linux 3.5 kernel, Mesa 8.1-devel from Git master, and the Git of xf86-video-ati and libdrm, I ran some new tests. Swap buffers wait was disabled while the other settings were at their defaults from the Ubuntu 12.04 operating system.

The tested graphics cards included an AMD Radeon HD 6770, Radeon HD 5830, and Radeon HD 6870. With each graphics card Mesa 8.1-devel git-bf679ce was benchmarked with and without Vadim's "r600g: improve flushed depth texture handling v2" patch.

<< Previous Page
1
Latest Linux Hardware Reviews
  1. Acer B286HK: A 28-inch UHD LED 4K Monitor For As Low As $350
  2. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  3. Intel 120GB 530 Series SSD Linux Performance
  4. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
Latest Linux Articles
  1. Mesa Git Yields Performance Improvements For Newer AMD GPUs
  2. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  3. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  4. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
Latest Linux News
  1. NVIDIA Posts Tegra Gallium3D Patch For K1+ Support
  2. Ubuntu 14.10 MacBook Air Tests With Linux 3.18, Mesa 10.5
  3. AMD Richland APU Support Added To Coreboot
  4. 2014 Holiday Shopping Reminder, Happy Thanksgiving
  5. Python 3 Support Added To The GNOME Shell
  6. ReactOS Lands Its New Explorer Shell
  7. Weston's IVI Shell Sees New Version
  8. IMP Launches As Another Open-Source Computer Attempt
  9. Git 2.2.0 Released With 550+ Changes
  10. GNOME 3.15.2 Released
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Hurrican SDL Port
  3. Roadmap to Catalyst 14.10 ?
  4. how to configure module phoromatic ?
  5. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  6. Debian Developer Resigns From The Systemd Maintainership Team
  7. Cant get working Kaveri APU - A10-7850k
  8. Script for Fan Speed Control